1995-1997 Audi A6 APA/URO Parts Coolant Reservoir - APA/URO Parts Coolant Reservoir w/ Level Indicator. A.P.A. URO A.P.A. URO is a supplier to many automotive manufacturers and provides OE quality European replacement parts to the aftermarket. URO Parts is a highly diversified product line including, body rubber, electrical, suspension, steering, cooling and air conditioning components.